Influence of chromium on the passivity of thermo-mechanically processed high-Mn TWIP steels

被引：18

作者：

Fajardo, S. ^{[1
]}

Llorente, I. ^{[1
]}

Jimenez, J. A. ^{[1
]}

Calderon, N. ^{[1
]}

Herran-Medina, D. ^{[1
]}

Bastidas, J. M. ^{[1
]}

Ress, J. ^{[2
]}

Bastidas, D. M. ^{[2
]}

机构：

[1] CSIC, Natl Ctr Met Res CENIM, Ave Gregorio del Amo 8, Madrid 28040, Spain

[2] Univ Akron, NCERCAMP, Dept Chem Biomol & Corros Engn, 302 E Buchtel Ave, Akron, OH 44325 USA

来源：

APPLIED SURFACE SCIENCE | 2020年 / 513卷

关键词：

Thermo-mechanical processing; TWIP steel; Passivity; Chromium; Cyclic potentiodynamic polarization; XPS; STACKING-FAULT ENERGY; FE-MN; CORROSION BEHAVIOR; STAINLESS-STEELS; TRIP/TWIP STEELS; CR ALLOYS; AL; MANGANESE; FILM; CHLORIDE;

D O I：

10.1016/j.apsusc.2020.145852

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Thermo-mechanical processed (TMP) TWIP steels with high-Mn content and different amounts of Cr, Fe-30Mn-5Al-0.5C-(x)Cr, were studied using cyclic potentiodynamic polarization (CPP), optical microscopy (OM), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX) in a deaerated 0.1 M NaCl solution. Additionally, X-ray photoelectron spectroscopy (XPS) was used to analyse the chemical composition of the passive film generated potentiostatically on TMP specimens in the deaerated 0.1 M NaCl solution. The results indicate a beneficial effect of Cr additions on the passivity of TWIP steels. However, a high content of Cr seemed to cause a phase-segregation process reducing the corrosion resistance properties of the material. The results also indicate that TMP enhances corrosion attack.

引用

页数：9

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